def solution(common):
answer = 0
if common[1] - common[0] == common[2] - common[1]:
answer = common[-1] + (common[1] - common[0])
elif common[1]/common[0] == common[2]/common[1]:
answer = common[-1] * (common[1]/common[0])
return answer
def solution(common):
answer = 0
a,b,c = common[:3]
if (b-a) == (c-b):
return common[-1]+(b-a)
else:
return common[-1] * (b//a)
return answer
등차와 등비를 구분하는 조건문 작성이 중요하다!